Surgical knife



FIG. 1 is a perspective view of a surgical knife, showing my new design;

FIG. 2 is a longitudinal top view of FIG. 1;

FIG. 3 is a bottom longitudinal view of FIG. 1;

FIG. 4 is a left side elevational view of FIG. 1;

FIG. 5 is a right side elevational view of FIG. 1;

FIG. 6 is a front end view of FIG. 1;

FIG. 7 is a rear end view of FIG. 1;

FIG. 8 is a perspective view of FIG. 1 with the cover in the closedposition; and,

FIG. 9 is a right side elevational view of FIG. 8.

The broken lines represent the environment of the surgical knife andform no part of the claimed design.

CLAIM The ornamental design for a surgical knife, as shown anddescribed.